Solvent 646: technical characteristics, GOST, composition

Solvent 646 is a very effective universal solvent, designed for use in various paints and varnishes. Thanks to it, the coatings after drying become extra luster. From this article you will learn:

- what is the solvent 646;

- specifications;

- GOST, the requirements of which it corresponds.

General characteristics of the solvent

The 646 thinner is a clear, colorless liquid (in some cases it may have a yellowish tint), characterized by a specific odor. The density of the solvent is 0.87 g / cc. Cm, it does not freeze and does not gain viscosity. Self-ignited at a temperature of 403 degrees, boils at 59 degrees.

It is manufactured in accordance with the requirements of GOST 18188-172. The solvent must have a uniform composition. It should not be spotted and flaky. Suspended particles in the liquid are also not allowed.

It is produced in industrial containers, in plastic and glass containers (bottles) of various volumes.

Solvent 646: technical specifications, composition

It is a compound of volatile organic substances. In the solvent 646, whose technical characteristics are in accordance with GOST 18188-72, the following substances are included:

• Toluene 50%;
• Butanol - 15%;
• Butyl acetate - 10%;
• Ethyl alcohol - 10%;
• Acetone - 7%;
• Ethylcellosolve - 8%.

Due to its composition it is considered the most active dissolving material.

Solvent 646 specifications are as follows:

• The volatility values for ethyl ether are in the range of 8 to 15;
• The coagulation number is at least 35%;
• The acid number does not exceed 0.06 mg KOH / g;
• The share of water (according to Fisher) is no more than 2%;
• Diluting effect - after drying, no whitening and film presence is observed, nitro-enamel is characterized by a smooth surface without stains.

Where is it applied?

Solvent 646 technical characteristics can be used to work with various paints, including nitrocellulose, melaninamide, glyptal, acrylic, epoxy. It is used either as an additive for the production of these materials, or for diluting them to the required consistency before use. Also, this reagent is added to the putty and primer to create an optimal working consistency, which allows for perfect alignment of the surfaces.

In some cases, the solvent P-646, the technical characteristics of which correspond to GOST, is used as a material for degreasing various surfaces or for washing equipment (in order to optimize a certain technological process).

What are the advantages of the solvent 646?

Among the main advantages of the solvent brand 646 can be noted the following:

• Is characterized by universality of application;
• Very high solubility;
• Gives additional gloss to the coatings;
• Easy to use;
• Does not lead to burns in case of contact with the skin;
• Does not form greasy spots on the treated surfaces;
• Evaporates without leaving a smell.

Mode of application

The solvent is added to the paint or varnish in small portions to the required density and viscosity. The diluted mixture must be constantly mixed. Since the solvent is characterized by high activity, it is necessary to take special care when working with it so as not to damage the lower coating layer.

Precautions for handling the solvent

Work should be carried out in rooms equipped with good ventilation, since the substance is toxic (classified as a third hazard class). In addition, when working with the brand 646 solvent, personal protective equipment such as a respirator and gloves should be used. Goggles are also recommended.

If the reagent is on the skin area, it should be treated with water (warm) using soap. In case of contact with eyes after washing, consult a doctor.

Given that this solvent is a flammable material, it is necessary to handle it carefully and in any case not to allow open flames, sparks, and smoking near the containers with the reagent.

How to store?

The solvent is stored in a tightly closed container. In addition, the container with the reagent must be protected from humidity, direct sunlight, heat. Do not leave any heaters in the vicinity of the solvent tanks.

The warranty period of storage (according to manufacturers' information) from the date of manufacture is 12 months, which enables enterprises to purchase this product in large batches.

The temperature values at which the solvent is stored are in the range from minus 40 to plus 40 Deg.